1. The problem statement, all variables and given/known data Two charges each +4 microcoloumbs ar eon the x axis, one at the origin and one at x=8m. Find the electic field at the x axis at x=10m and x=2m. 2. Relevant equations E=kq/r 3. The attempt at a solution I tried the x=10m first. What I did was take E1=kq/r^2, or (8.99x10^9*4mC)/8^2 and E2=kq/r^2, or (8.99 x 10^9*4mC)/2^2, and then added E1 and E2 up. And it was wrong. Am I doing it wrong?